Citrullus lanatus or wattermelon is a plant species in the faimily Cucurbitaceae, a vine-lik (scrambler an trailer) flouerin plant oreeginally frae sub-Saharan Africae. It is cultivatit for its fruit.

The citron melon (Citrullus caffer) was formerly conseedered a cultivar of the Citrullus lanatus species, but is now conseedered a separait species. Unlik the wattermelon, it is mair bitter and has whit flesh.